Device for separating sheetlike materials



5 E. JOHANSON ETAL 2,616,574

DEVICE FOR SEPARATING SHEETLIKE MATERIALS Filed July 12. 1950 Patented Nov. 4, 1952 DEVICE FOR SEPARATING SHEETLIKE IMATERIALS' Erik Johanson, Bertil Bergvall, and Uno Alfredsson, Jonkoping, Sweden, assignors to A B Svenska Flaktfabriken, Stockholm,

Sweden Application July 12, 1950, Serial No. 173,454 In Sweden July 12, 1949 3 Claims. 1

In producing sheet-like materials especially plates or sheets of defibrated wood, peat or similar materials a method is known by which the sheets are heated two and two with their plane surfaces in confronting engagement with each other and in this condition are introduced into a hardening chamber, where they are subjected to a heat treatment, so called hardening. The hardening is effected in order to increase the strength of the sheets and in order to affect the colour of the sheets.

The present invention relates to an arrangement for stacking and separating such sheets and similar materials and is characterised. by at least one table provided with gears and a circular toothed segment by means or which the upper part of the table is rotatable about an axis common with the centre of rotation of the toothed segment. ihe table is provided with one or more suction ports which are connected to a suction pipe so that in a vertical position of the rotatable part of the table the sheet lying nearest to the suction ports is held against the table until the rotatable part or" the table has resumed a horizontal position.

Fig. l is an elevational view of the invention showing the table parts in horizontal position.

Fig. 2 is a similar elevational view showing the table parts in vertical juxtaposed position.

Fig. 3 is a sectional elevational view of a table part illustrating a suction part in detail.

The sheets lying upon each other are in the drawing designated 2, 3 respectively. The sheets are fed to one or the other of a pair of tables It and it each with a rotatable upper part it and 19 respectively. These rotatable parts of the tables are provided with suction ports I, t and 8, 9 respectively which are connected to the suction side of a fan or other suction device by means of the pipes 5, l t, 55. Each table is provided with a toothed segment IE, 53 which is driven by the gears ll, l2 respectively, whereby the table parts it] and is are raised from a horizontal position to a vertical one. When separating the sheets they are first fed to one of the tables after which the rotatable parts of both tables are turned to a vertical position by means of the gear arrangement. In the embodiment shown in the drawing the rotatable parts of the tables meet in a vertical position with the sheets 2, 3 placed between the suction ports of both tables. When the table parts ll, 16 are in a vertical position or possibly during the rotation upwards the damper means of the suction pipes are opened so that the sheets 2 and 3 are held by the suction ports against the table parts it! and 19, respectively. When the table parts have obtained a vertical position, said tables turn and resume their horizontal position each table carrying with it one of the sheets which thereby is held in place by means of the suction ports. Immediately before the rotatable parts of the tables have resumed a horizontal position the dampers of the suction pipe are closed and each sheet is released from the suction ports. Thus the sheets are each placed on a table separate and from there transported to succeeding treatments.

What we claim is:

1. Apparatus for stacking and separating sheet materials comprising a pair of laterally adjacent members pivotally mounted at their inner edges for swinging movement in respectively opposite directions between horizontal positions and vertical positions in which said members are disposed in closely spaced parallel relation to each other, drive means for each member operable to actuate the members between said horizontal and vertical positions, means defining a plurality of suction ports in the surfaces of said members disposed in parallel confronting relation in the vertical positions of the members, and a suction pipe connected to the ports of each member to hold adjacent sheets on the respective members until the same are disposed substantially in their horizontal positions.

2. Apparatus for stacking and separating sheet materials comprising a pair of laterally adjacent members pivotally mounted at their inner edges for swinging movement between horizontal positions and vertical positions in which said members are disposed in closely spaced parallel relation to each other, a toothed segment fixed to each member, a drive gear meshed with each segment and operable to actuate the latter and the member between said horizontal and vertical positions, means defining a plurality of suction ports in the surfaces of said members which are disposed in parallel confronting relation in the vertical positions of the members, and a suction pipe connected to the ports of each member to hold adjacent sheets on the respective members until the same are disposed substantially in their horizontal positions.

3. Apparatus for stacking and separating sheet materials comprising a pair of tables arranged adjacent each other, a member pivotally mounted at the inner edge of each table for swinging movement between horizontal positions overlying the tables and vertical positions in which said members are disposed in closely spaced parallel relation to each other, drive means for each member operable to actuate the members between said REFERENCES CITED horizontal and vertical positions, means defining The following references are or record m the a plurality of suction ports in the surfaces of said me of this patent:

members which are disposed in parallel confronting relation in the vertical positions of the mem- 5 UNITED STATES PATENTS bers, and a suction pipe connected to the ports of Number Name Date each member to hold adjacent sheets on the re- 2,271,213 Weidner Jan. 27, 1942 spective members until the same are disposed 2,390,901 Schramm Dec. 11, 1945 substantially in their horizontal positions. 2,520,252 Mutchler Aug. 29, 1950 ERIK JOHANSON. 10

BERTIL BERGVALL, UNO ALFREDSSON. 

